Remove reference to ci_reporter in Rakefile outside test env
Remove reference to ci_reporter in Rakefile outside test env

ci_reporter is only included in the test gemfile environment which means
it's not available in rails development mode. The conditional require in
Rakefile should follow the same pattern and only fire when we're in rails
test mode, otherwise we can't run any rake tasks locally.

alphagov/whitehall,alphagov/whitehall,alphagov/whitehall,alphagov/whitehall